Usually refer to a PC gamer or a PC mustard race dude with no social life, waistline exceeding 36 inches, over 25% body fat, fedora wearer, never touched a woman in his life. A person who willing to pay $2000 to buy dated potato that can't keep up with a console and believe their inferior platform able to play every single video game at 4K resolution and 120 frame rate even when every benchmark test told them otherwise.
Bob: "bla! wanna see 4k/120fps on my $300 PC? mustard race ftw!(then breathing hard)"
Joe: "No thanks, I prefer to lay on my couch playing with a controller in my living room"
A large human, usually at least 8 feettall, who sweats profusely from the palms and other orifices, tends to pick on smaller, more innocent life forms, and will inevitably become a super senior. Most commonly seen in a Black Sabbath or R. Kelly t-shirt. Avoid at all costs.
Robert Sylvester: Man, I just shook the sweatiest hand. Who da fuck's was it?
Mrs. Madsen: Why that's my little kitty Peepeeson!!!!!!
Pajama casual is a term used when working from home and preparing for a video conference. All business above the waist and your pajama pants down below.